Granted Patent
Utility
US 4,845,420 · App. 07/249,652
Drive circuit device for inductive load
Inventors:
Hidekazu Oshizawa, Ryoichi Harada, Masami Okano
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Sep 27, 1988
Inventors
Hidekazu Oshizawa
Ryoichi Harada
Masami Okano
Assignee (at issue)
Diesel Kiki Co., Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.